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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-24 00:20:59 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-24 00:20:59 (GMT) |
commit | 5a010c73cdb760c9bdf37b28824b6566789cc005 (patch) | |
tree | a12508a6d3b20807eaa822bedd95973df47d6307 /drivers/platform/x86/dell-smbios.c | |
parent | b615d3d406ead1157c6b846c417b71a3b6600776 (diff) | |
parent | fffcad87d4e7c5f6f6f6e5fc9d337bd6f197f80f (diff) | |
download | linux-5a010c73cdb760c9bdf37b28824b6566789cc005.tar.xz |
Merge tag 'platform-drivers-x86-v4.6-1' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86
Pull x86 platform driver updates from Darren Hart:
"Significant refactoring of Dell laptop drivers, modularizing the
smbios code. Multiple new platforms added for ideapad, asus, dell,
and alienware using existing quirks. A few fixes and cleanups.
hp-wmi:
- Remove GPS rfkill support via pre-2009 interface
- fix unregister order in hp_wmi_rfkill_setup() once again
ideapad-laptop:
- Add ideapad Y700 (15) to the no_hw_rfkill DMI list
fujitsu-laptop:
- Support radio toggle button
intel-hid:
- allocate correct amount of memory for private struct
platform/x86:
- Make intel_scu_ipc explicitly non-modular
intel_pmc_ipc:
- Avoid pending IPC1 command during legacy suspend
- Fix GCR register base address and length
asus-nb-wmi:
- add wapf=4 quirk for ASUS X75VD
intel_telemetry_pltdrv:
- Change verbosity control bits
dell-rbtn:
- Add a comment about the XPS 13 9350
dell-wmi, dell-laptop:
- depends DMI
dell-wmi:
- support Dell Inspiron M5110
- properly process Dell Instant Launch hotkey
- enable receiving WMI events on Dell Vostro V131
- Support new hotkeys on the XPS 13 9350 (Skylake)
- Clean up hotkey table size check
- Stop storing pointers to DMI tables
dell-laptop:
- move dell_smi_error() to dell-smbios
- use dell_smbios_find_token() instead of find_token_location()
- use dell_smbios_find_token() instead of find_token_id()
- extract SMBIOS-related code to a separate module
dell-smbios:
- rename dell_smi_error() to dell_smbios_error()
- make da_tokens static
- remove find_token_{id,location}()
- implement new function for finding DMI table 0xDA tokens
- make the SMBIOS buffer static
- return the SMBIOS buffer from dell_smbios_get_buffer()
- don't return an SMBIOS buffer from dell_smbios_send_request()
- don't pass an SMBIOS buffer to dell_smbios_send_request()
- rename dell_send_request() to dell_smbios_send_request()
- rename release_buffer() to dell_smbios_release_buffer()
- rename clear_buffer() to dell_smbios_clear_buffer()
- rename get_buffer() to dell_smbios_get_buffer()
dell-led:
- use dell_smbios_send_request() for performing SMBIOS calls
- use dell_smbios_find_token() for finding mic DMI tokens
toshiba_acpi:
- Add a module parameter to disable hotkeys registration
- Add sysfs entries for the Cooling Method feature
- Add support for cooling method feature
Documentation/ABI:
- Update sysfs-driver-toshiba_acpi file
thinkpad_acpi:
- Remove ambiguous logging for "Unsupported brightness interface"
alienware-wmi:
- whitespace improvements
- Add support for two new systems: ASM200 and ASM201.
- Add support for deep sleep control.
- Add initial support for alienware graphics amplifier.
- Add support for new platform: X51-R3
- Clean up whitespace for ASM100 platform"
* tag 'platform-drivers-x86-v4.6-1' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86: (47 commits)
hp-wmi: Remove GPS rfkill support via pre-2009 interface
hp-wmi: fix unregister order in hp_wmi_rfkill_setup() once again
dell-wmi: support Dell Inspiron M5110
dell-wmi: properly process Dell Instant Launch hotkey
dell-wmi: enable receiving WMI events on Dell Vostro V131
dell-smbios: rename dell_smi_error() to dell_smbios_error()
dell-laptop: move dell_smi_error() to dell-smbios
ideapad-laptop: Add ideapad Y700 (15) to the no_hw_rfkill DMI list
fujitsu-laptop: Support radio toggle button
intel-hid: allocate correct amount of memory for private struct
platform/x86: Make intel_scu_ipc explicitly non-modular
intel_pmc_ipc: Avoid pending IPC1 command during legacy suspend
intel_pmc_ipc: Fix GCR register base address and length
asus-nb-wmi: add wapf=4 quirk for ASUS X75VD
intel_telemetry_pltdrv: Change verbosity control bits
dell-rbtn: Add a comment about the XPS 13 9350
dell-wmi: Support new hotkeys on the XPS 13 9350 (Skylake)
dell-wmi: Clean up hotkey table size check
dell-wmi, dell-laptop: depends DMI
dell-wmi: Stop storing pointers to DMI tables
...
Diffstat (limited to 'drivers/platform/x86/dell-smbios.c')
-rw-r--r-- | drivers/platform/x86/dell-smbios.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/drivers/platform/x86/dell-smbios.c b/drivers/platform/x86/dell-smbios.c new file mode 100644 index 0000000..d2412ab --- /dev/null +++ b/drivers/platform/x86/dell-smbios.c @@ -0,0 +1,193 @@ +/* + * Common functions for kernel modules using Dell SMBIOS + * + * Copyright (c) Red Hat <mjg@redhat.com> + * Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com> + * Copyright (c) 2014 Pali Rohár <pali.rohar@gmail.com> + * + * Based on documentation in the libsmbios package: + * Copyright (C) 2005-2014 Dell Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/dmi.h> +#include <linux/err.h> +#include <linux/gfp.h> +#include <linux/mutex.h> +#include <linux/slab.h> +#include <linux/io.h> +#include "../../firmware/dcdbas.h" +#include "dell-smbios.h" + +struct calling_interface_structure { + struct dmi_header header; + u16 cmdIOAddress; + u8 cmdIOCode; + u32 supportedCmds; + struct calling_interface_token tokens[]; +} __packed; + +static struct calling_interface_buffer *buffer; +static DEFINE_MUTEX(buffer_mutex); + +static int da_command_address; +static int da_command_code; +static int da_num_tokens; +static struct calling_interface_token *da_tokens; + +int dell_smbios_error(int value) +{ + switch (value) { + case 0: /* Completed successfully */ + return 0; + case -1: /* Completed with error */ + return -EIO; + case -2: /* Function not supported */ + return -ENXIO; + default: /* Unknown error */ + return -EINVAL; + } +} +EXPORT_SYMBOL_GPL(dell_smbios_error); + +struct calling_interface_buffer *dell_smbios_get_buffer(void) +{ + mutex_lock(&buffer_mutex); + dell_smbios_clear_buffer(); + return buffer; +} +EXPORT_SYMBOL_GPL(dell_smbios_get_buffer); + +void dell_smbios_clear_buffer(void) +{ + memset(buffer, 0, sizeof(struct calling_interface_buffer)); +} +EXPORT_SYMBOL_GPL(dell_smbios_clear_buffer); + +void dell_smbios_release_buffer(void) +{ + mutex_unlock(&buffer_mutex); +} +EXPORT_SYMBOL_GPL(dell_smbios_release_buffer); + +void dell_smbios_send_request(int class, int select) +{ + struct smi_cmd command; + + command.magic = SMI_CMD_MAGIC; + command.command_address = da_command_address; + command.command_code = da_command_code; + command.ebx = virt_to_phys(buffer); + command.ecx = 0x42534931; + + buffer->class = class; + buffer->select = select; + + dcdbas_smi_request(&command); +} +EXPORT_SYMBOL_GPL(dell_smbios_send_request); + +struct calling_interface_token *dell_smbios_find_token(int tokenid) +{ + int i; + + for (i = 0; i < da_num_tokens; i++) { + if (da_tokens[i].tokenID == tokenid) + return &da_tokens[i]; + } + + return NULL; +} +EXPORT_SYMBOL_GPL(dell_smbios_find_token); + +static void __init parse_da_table(const struct dmi_header *dm) +{ + /* Final token is a terminator, so we don't want to copy it */ + int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1; + struct calling_interface_token *new_da_tokens; + struct calling_interface_structure *table = + container_of(dm, struct calling_interface_structure, header); + + /* 4 bytes of table header, plus 7 bytes of Dell header, plus at least + 6 bytes of entry */ + + if (dm->length < 17) + return; + + da_command_address = table->cmdIOAddress; + da_command_code = table->cmdIOCode; + + new_da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) * + sizeof(struct calling_interface_token), + GFP_KERNEL); + + if (!new_da_tokens) + return; + da_tokens = new_da_tokens; + + memcpy(da_tokens+da_num_tokens, table->tokens, + sizeof(struct calling_interface_token) * tokens); + + da_num_tokens += tokens; +} + +static void __init find_tokens(const struct dmi_header *dm, void *dummy) +{ + switch (dm->type) { + case 0xd4: /* Indexed IO */ + case 0xd5: /* Protected Area Type 1 */ + case 0xd6: /* Protected Area Type 2 */ + break; + case 0xda: /* Calling interface */ + parse_da_table(dm); + break; + } +} + +static int __init dell_smbios_init(void) +{ + int ret; + + dmi_walk(find_tokens, NULL); + + if (!da_tokens) { + pr_info("Unable to find dmi tokens\n"); + return -ENODEV; + } + + /* + * Allocate buffer below 4GB for SMI data--only 32-bit physical addr + * is passed to SMI handler. + */ + buffer = (void *)__get_free_page(GFP_KERNEL | GFP_DMA32); + if (!buffer) { + ret = -ENOMEM; + goto fail_buffer; + } + + return 0; + +fail_buffer: + kfree(da_tokens); + return ret; +} + +static void __exit dell_smbios_exit(void) +{ + kfree(da_tokens); + free_page((unsigned long)buffer); +} + +subsys_initcall(dell_smbios_init); +module_exit(dell_smbios_exit); + +MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); +MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>"); +MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>"); +MODULE_DESCRIPTION("Common functions for kernel modules using Dell SMBIOS"); +MODULE_LICENSE("GPL"); |